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<div><a href="../index.html">Home</a> &gt;  <a href="index.html">fvcom_prepro</a> &gt; nodes2elems.m</div>

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<h1>nodes2elems
</h1>

<h2><a name="_name"></a>PURPOSE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="box"><strong>Transfer a field from vertices to elements</strong></div>

<h2><a name="_synopsis"></a>SYNOPSIS <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="box"><strong>function [fieldout]  = nodes2elems(fieldin,Mobj) </strong></div>

<h2><a name="_description"></a>DESCRIPTION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="fragment"><pre class="comment"> Transfer a field from vertices to elements

 function [fieldout] = nodes2elems(fieldin,Mobj)  

 DESCRIPTION:
    Smooth a vertex based field 

 INPUT
    Mobj         = Matlab mesh object
    fieldin      = vertex-based field

 OUTPUT:
    fieldout = element-based field

 EXAMPLE USAGE
    f = smoothfield(fv,Mobj)

 Author(s):  
    Geoff Cowles (University of Massachusetts Dartmouth)

 Revision history
   
==============================================================================</pre></div>

<!-- crossreference -->
<h2><a name="_cross"></a>CROSS-REFERENCE INFORMATION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
This function calls:
<ul style="list-style-image:url(../matlabicon.gif)">
</ul>
This function is called by:
<ul style="list-style-image:url(../matlabicon.gif)">
<li><a href="example.html" class="code" title="">example</a>	example demonstrating reading in a 2DM file and constructing a model</li></ul>
<!-- crossreference -->



<h2><a name="_source"></a>SOURCE CODE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="fragment"><pre>0001 <a name="_sub0" href="#_subfunctions" class="code">function [fieldout]  = nodes2elems(fieldin,Mobj)</a>
0002 
0003 <span class="comment">% Transfer a field from vertices to elements</span>
0004 <span class="comment">%</span>
0005 <span class="comment">% function [fieldout] = nodes2elems(fieldin,Mobj)</span>
0006 <span class="comment">%</span>
0007 <span class="comment">% DESCRIPTION:</span>
0008 <span class="comment">%    Smooth a vertex based field</span>
0009 <span class="comment">%</span>
0010 <span class="comment">% INPUT</span>
0011 <span class="comment">%    Mobj         = Matlab mesh object</span>
0012 <span class="comment">%    fieldin      = vertex-based field</span>
0013 <span class="comment">%</span>
0014 <span class="comment">% OUTPUT:</span>
0015 <span class="comment">%    fieldout = element-based field</span>
0016 <span class="comment">%</span>
0017 <span class="comment">% EXAMPLE USAGE</span>
0018 <span class="comment">%    f = smoothfield(fv,Mobj)</span>
0019 <span class="comment">%</span>
0020 <span class="comment">% Author(s):</span>
0021 <span class="comment">%    Geoff Cowles (University of Massachusetts Dartmouth)</span>
0022 <span class="comment">%</span>
0023 <span class="comment">% Revision history</span>
0024 <span class="comment">%</span>
0025 <span class="comment">%==============================================================================</span>
0026 subname = <span class="string">'nodes2elems'</span>;
0027 <span class="keyword">global</span> ftbverbose;
0028 <span class="keyword">if</span>(ftbverbose);
0029   fprintf(<span class="string">'\n'</span>)
0030   fprintf([<span class="string">'begin : '</span> subname <span class="string">'\n'</span>])
0031 <span class="keyword">end</span>;
0032 
0033 <span class="comment">%------------------------------------------------------------------------------</span>
0034 <span class="comment">% Parse input</span>
0035 <span class="comment">%------------------------------------------------------------------------------</span>
0036 
0037 <span class="keyword">if</span>(exist(<span class="string">'fieldin'</span>)*exist(<span class="string">'Mobj'</span>) == 0)
0038     error(<span class="string">'arguments to nodes2elems are missing'</span>)
0039 <span class="keyword">end</span>;
0040 
0041 <span class="keyword">if</span>(length(fieldin) ~= Mobj.nVerts)
0042     error(<span class="string">'field size in nodes2elems is not the same as number of nodes in Mesh'</span>)
0043 <span class="keyword">end</span>;
0044 
0045 <span class="comment">%------------------------------------------------------------------------------</span>
0046 <span class="comment">% Tranfser</span>
0047 <span class="comment">%------------------------------------------------------------------------------</span>
0048 fieldout = zeros(Mobj.nElems,1);
0049 
0050 <span class="keyword">for</span> i=1:Mobj.nElems
0051     fieldout(i) = sum(fieldin(Mobj.tri(i,1:3)))/3.; 
0052 <span class="keyword">end</span>;
0053 
0054 
0055 <span class="keyword">if</span>(ftbverbose);
0056   fprintf([<span class="string">'end   : '</span> subname <span class="string">'\n'</span>])
0057 <span class="keyword">end</span>;
0058</pre></div>
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